You can also submit it to VirusTotal to see if other AVs detect it. However, don't draw any conclusions from the results. If a file is detected by a large number of AVs it does not make it malicious. Likewise, if a file is not detected by any of the AVs it does not make it benign.

As a preventive measure you can rename the file and restart the computer. Should it later turn out to be a benign file you will be able to rename it back.